I do not trust the play store app because anyone can make a fake app and scam you. iOS apps are still better as those are published after verification.
Bread wallet is the best iOS wallet but still do not store all of your money in phone wallets. They are subjected to risk and also can be stolen easily.
Although apple iphones are safe even if they are stolen because they have better security but its better we do not take any risk with our bitcoins.
If you didn't do a research then you will be compromised by the fake apps scattered on google play but if you do directly with there site and download there respective apps then you will be fine, and also make sure you didn't any malicious thing that might compromise your safety and always secure your device with 2fa so that the hacker cannot easily send your balance since the security of your phone is so tightened.